Alright, I need to create a body fat percentage calculator as per the user's request. Let me break down the requirements to ensure I cover everything.
First, the calculator must be a single HTML file with embedded CSS and JavaScript. I'll structure it with a header, main content, and sections for the calculator and the article. The design needs to be professional, using specific colors and a clean layout.
For the calculator itself, I'll need input fields for weight, height, age, and gender. These will be wrapped in .input-group classes for styling. Each input should have a label and helper text. I'll include a reset button to clear inputs and set default values.
The JavaScript will handle real-time calculations. I'll use the formula for body fat percentage, which varies by gender. For men, it's 49.5/weight^0.428 * height^0.720 * age^0.014, and for women, it's 49.5/weight^0.428 * height^0.720 * age^0.014 minus 1.7. I'll also calculate BMI and body fat category.
I need to ensure error handling for invalid inputs, showing messages below each input if necessary. The results should update dynamically and include a copy button to share the results.
Next, the article section. It should explain what body fat percentage is, the formula, practical examples, how to use the calculator, key factors affecting results, FAQs, and related tools. I'll make sure to include internal links and related keywords for SEO.
I'll structure the HTML with semantic tags, ensuring responsiveness. Tables and charts must be mobile-friendly, so I'll use overflow-x for tables and adjust chart widths. The CSS will be embedded, using the specified colors and a centered container for readability.
Finally, I'll write the JavaScript to handle input changes, calculations, and result display. I'll test the code to ensure it works correctly, handles edge cases, and updates the UI smoothly.
Putting it all together, I'll ensure the HTML is clean, well-structured, and meets all the user's requirements, including SEO optimizations and proper keyword usage.
Body Fat Percentage Calculator | Health & Wellness Guide
What is Body Fat Percentage?
Body fat percentage (BFP) measures the proportion of fat in your body relative to lean mass. It's a crucial indicator of overall health and fitness.
Body Fat Percentage Formula
The formula used in this calculator is:
BFP = 49.5 / (weight^0.428 * height^0.720 * age^0.014) – 1.7 (for women)
BFP = 49.5 / (weight^0.428 * height^0.720 * age^0.014) (for men)
Variables:
| Variable |
Meaning |
Unit |
Typical Range |
| Weight |
Body weight |
kg |
30-150 kg |
| Height |
Body height |
cm |
100-220 cm |
| Age |
Age in years |
years |
18-100 years |